package servlet;

import model.User;
import model.UserDao;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;

@WebServlet("/login")
public class LoginServlet extends HttpServlet {
    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        req.setCharacterEncoding("utf8");
        String username=req.getParameter("username");
        String password=req.getParameter("password");
        if(username==null||username.length()==0||password==null||password.length()==0){
            resp.setContentType("text/html;charset=utf8");
            resp.getWriter().write("您输入的用户或者密码为空！");
            return;
        }
        UserDao userDao=new UserDao();
        User user=userDao.getUserByName(username);
        if(user==null){
            resp.setContentType(("text/html;charset=utf8"));
            resp.getWriter().write("您输入的用户名或密码不正确!");
            return;
        }
        if(!password.equals(user.getPassword())){
            resp.setContentType("text/html;charset=utf8");
            resp.getWriter().write("您输入的用户名或密码不正确!");
            return;
        }

        HttpSession session=req.getSession(true);
        session.setAttribute("user",user);
        resp.sendRedirect("blog_list.html");
    }

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        HttpSession session=req.getSession(false);
        if(session==null){
            resp.setStatus(403);
            return;
        }
        User user=(User) session.getAttribute("user");
        if(user==null){
            resp.setStatus(403);
            return;
        }
        resp.setStatus(200);
    }
}
